STMicroelectronics NUCLEO-H503RB STM32 Nucleo-64 Board is an affordable and flexible way to test concepts and build prototypes. The STMicroelectronics NUCLEO-H503RB is an open development platform that offers a range of performance and power consumption features thanks to the STM32 microcontroller. The board is compatible with external SMPS, significantly reducing power consumption in run mode. Expand the board’s functionality with ARDUINO® Uno V3 connectivity support and ST morpho headers.